Optical remote sensing method for acquiring absolute light intensity of aerosol

Abstract

The invention discloses an optical remote sensing method for acquiring absolute light intensity of aerosol. According to the invention, an optical remote sensing system composed of at least a light source, optical fiber, a CCD detector, a spectrograph, a telescope, optical corner reflectors, a pan-tilt, a controller and a computer is involved. The telescope is connected to the spectrograph through optical fiber. The spectrograph is connected to the CCD detector, which is connected to the controller. Two optical corner reflectors are arranged. The telescope is installed on the pan-tilt. The controller is connected to the detector, the pan-tilt and the computer, and sets measuring time to drive the telescope to rotate. Through different light paths formed by the light source and the two optical corner reflectors, light intensity of different light distances is measured. The controller is connected to the computer and transmits a measuring result into the computer so as to calculate absolute light intensity of aerosol. Selection of light distances is set according to detection limit in measurement of atmospheric pollution gas types and aerosol extinction coefficients. The invention provides technical support for treating national haze weather, reducing aerosol pollution and researching atmospheric gas phase / particle heterogeneous reaction.

Description

technical field [0001] The invention relates to an optical remote sensing method for obtaining the absolute light intensity of aerosol, and belongs to the technical field of atmospheric chemistry. Background technique [0002] The aerosol is a colloidal dispersion system formed by dispersing solid or liquid small particles and suspending them in a gas medium, also known as a gas dispersion system. The dispersed phase is solid or liquid small particles with a size of 0.001 to 100 microns, and the dispersion medium is gas. Clouds, fog, and dust in the sky, smoke from unburned fuel in boilers and various engines used in industry and transportation, solid dust from mining, quarry grinding, and grain processing, Man-made masking smoke and toxic smoke are specific examples of aerosols. Haze is a phenomenon in which a large number of extremely fine dry dust particles evenly float in the air, making the air generally turbid with horizontal visibility less than 10 kilometers. The dr...

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Problems solved by technology

[0004] However, as the complex pollution of the atmosphere is becoming more and more serious, the oxidation of the atmosphere is enhanced, and the conversion of gas to particulate matter is accelerating. To achieve real-time and online acquisition of complex atmospheric pollution gases and aerosols, a new method for simultaneous monitoring of them in a large area is needed.

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